Sputtering at WOT

[GSX26]

Alright, here's the problem. At WOT, the car "sputters". When I'm just giving gas slowly, but still boostin, it's fine. Also at wot, my a/f (i know, it's a piece of crap) reads pig rich. So, I'm thinking boost leak? But then I had a car enthusiast drive it, and he said it seemed like it was way too lean. My settings are -37.5 global and 450 deatime with no fine adjustments. The car ran fine about 2 days ago, with the same settings. Maybe the cold weather? Also, he said it smelt like the clutch was burning, which I did smell. Could it just be my clutch slipping because it's burnt out? Also, could i have floated a valve when I took the car upto 8k by accident while trying to show off? Maybe I lifted the head and blew the headgasket? Also, at WOT, my egt's were 1500+ which never used to be that high. It's also like 12 degrees out here right now. I'm going to boost leak test it over the weekend, but what else do you guys think it could be? Any opinions are appreciated. Thanks

 

[blackGSX2g]

Have you checked plugs and wires?

I know I had that problem before and it turned out my plug wires were arcing at the coil pack when I went WOT.

 

[GSX26]

yeah, I haven't checked em yet, I'll do that tomorrow. I have a couple extra sets of plugs and wires laying around anyways. Thanks for the tip....any more guys? Thanks